package com.weizengquan.ereader.rss;

import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;

import com.weizengquan.ereader.R;
import com.weizengquan.ereader.R.id;
import com.weizengquan.ereader.R.layout;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class ItemList extends Activity {
	
	String streamTitle = "";
	
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.channel_list);
        
        TextView result = (TextView)findViewById(R.id.result);
        
        try {
//			URL rssUrl = new URL("http://feeds.feedburner.com/Android-er?format=xml");
			URL rssUrl = new URL("http://rss.msnbc.msn.com/id/3032091/device/rss/rss.xml");        	
			
			SAXParserFactory mySAXParserFactory = SAXParserFactory.newInstance();
			SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
			XMLReader myXMLReader = mySAXParser.getXMLReader();
			RSSHandler myRSSHandler = new RSSHandler();
			myXMLReader.setContentHandler(myRSSHandler);
			InputSource myInputSource = new InputSource(rssUrl.openStream());
			myXMLReader.parse(myInputSource);
			
			result.setText(streamTitle);
			
		} catch (MalformedURLException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			result.setText("Cannot connect RSS!");
		} catch (ParserConfigurationException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			result.setText("Cannot connect RSS!");
		} catch (SAXException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			result.setText("Cannot connect RSS!");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			result.setText("Cannot connect RSS!");
		}
        
        
    }
    
    private class RSSHandler extends DefaultHandler
    {
    	final int stateUnknown = 0;
    	final int stateTitle = 1;
    	int state = stateUnknown;
    	
    	int numberOfTitle = 0;
    	String strTitle = "";
    	String strElement = "";
    	
		@Override
		public void startDocument() throws SAXException {
			// TODO Auto-generated method stub
			strTitle = "--- Start Document ---\n";
		}

		@Override
		public void endDocument() throws SAXException {
			// TODO Auto-generated method stub
			strTitle += "--- End Document ---";
			streamTitle = "Number Of Title: " + String.valueOf(numberOfTitle) + "\n"
						+ strTitle;
		}

		@Override
		public void startElement(String uri, String localName, String qName,
				Attributes attributes) throws SAXException {
			// TODO Auto-generated method stub
			if (localName.equalsIgnoreCase("title"))
			{
				state = stateTitle;
				strElement = "Title: ";
				numberOfTitle++;
			}
			else
			{
				state = stateUnknown;
			}
		}

		@Override
		public void endElement(String uri, String localName, String qName)
				throws SAXException {
			// TODO Auto-generated method stub
			if (localName.equalsIgnoreCase("title"))
			{
				strTitle += strElement + "\n";
			}
			state = stateUnknown;
		}

		@Override
		public void characters(char[] ch, int start, int length)
				throws SAXException {
			// TODO Auto-generated method stub
			String strCharacters = new String(ch, start, length);
			if (state == stateTitle)
			{
				strElement += strCharacters;
			}
		}
    	
    }
}